Use two numbers, not one
A trade allowance is the amount offered for your current vehicle. The payoff is the amount needed to settle its existing loan. Their difference is the equity. A high trade offer can still leave little equity if the payoff is also high.
Get a current payoff quote from your lender and note how long it is valid. The CFPB explains that a balance remaining after a trade may be rolled into a new loan, increasing its cost. The old debt has not disappeared when a dealer says it will handle the payoff.
Positive equity reduces the amount to cover
Suppose the allowance is $17,000 and the payoff is $13,500. The equity is $3,500. In an illustration where the next purchase totals $32,600 before the trade or down payment, applying that equity and $2,000 cash reduces the estimated amount financed to $27,100.
| Calculation | Amount |
|---|---|
| Purchase total before trade and cash | $32,600 |
| Less positive trade equity | −$3,500 |
| Less cash down | −$2,000 |
| Estimated amount financed | $27,100 |
The entire $17,000 allowance does not act as a down payment, because $13,500 settles the previous debt. Subtracting both the allowance and the equity would count part of the trade twice.
Negative equity adds to the next obligation
Now keep the $17,000 allowance but change the payoff to $20,500. Equity is negative $3,500. With the same $32,600 purchase total and $2,000 cash down, rolling all of that shortfall into the new loan produces an estimated $34,100 amount financed.
| Calculation | Amount |
|---|---|
| Purchase total before trade and cash | $32,600 |
| Add unpaid trade balance | +$3,500 |
| Less cash down | −$2,000 |
| Estimated amount financed | $34,100 |
The two examples differ by $7,000: the first applies $3,500 of value, while the second carries $3,500 of debt. These examples hold entered taxes and fees constant to isolate equity; real tax treatment can vary.
Compare the complete transaction
Compare the vehicle price and the trade allowance together when looking at two dealers. An extra $1,000 offered for your trade does not improve the overall deal if the replacement vehicle costs $1,000 more and everything else is unchanged.
Ask for the allowance, payoff, cash down, and new amount financed on the same written worksheet. After the transaction, confirm with your previous lender that the loan has been paid off. The CFPB recommends checking this rather than assuming the paperwork has been completed.
Check it in the calculator
Car Deal Check’s Trade-In tab calculates the difference between allowance and payoff. Use the Manual Calculator when you want to include that equity in a complete purchase estimate. Enter zero as the payoff if the vehicle is paid off; leaving it blank means the information is missing.
- What is the current payoff, and when does that quote expire?
- How much equity or unpaid balance is applied to this purchase?
- Where does the old balance appear in the new amount financed?
- Can you show the deal with and without the trade?
- How and when will I confirm the previous loan is settled?